Tamping apparatus



H. S. BROWN TAMPING APPARATUS Filed Sept.

2 sheets-sheet 1 Oct. 14, 1930. HQ s# BRowN 1,778,547

TAMPING APPARATUS Patented Oct. 14, 1930 HUGH STEWART BROWN, OF HARVEY, ILLINOIS TAIv'PNG APPARATS Application filed. September' 30, Serial No. 138,?12.

rlhis invention relates to in improvement in reciprocating tools, such, for example, -as

rock drills, tampers and machines of kindred type which can be handled and controlled by a single operator.

One of the objects of the present invention is to provide a vibratorytype of tool which is light in weiOht, simple in construction and etlicieiit in operation.

i further object of the invention is to pro* vide'a vibratory type ot tool in which there is no rigid connection between the striking part of the tool and casing, thereby eliminatthe vibration through the casing and requiring less amount of power to operate the tool.; v

A further object of the inventionis to provide a vibiatory type of too-l in which the operating parts ofthe tool, as well as the motor, can be completely encased in a dust proof casing. f

A further object of thevinvention is to provide a vibratory type of toolwith a novel rocker drive and `buffer spring),` construction whichreduces the amount of vibration transmitted to the cas-ing to aminimiim.

still further object of the invention is to provide an improved vibratory type of tool in whiclithe intensity of the vibration of the impr ved vibratoiy tool. Y Y

Fig. Q- is ,a top plan view partly in crossV vsection of the vibratorytool shownv in Fig; 1A

Fie'. 3 is afoross sectionalview ltaken on the line of Figl. 1

Vthe rocker member; and

Fig. .ris an end elevationalviewof the saine. y l

in the preferred embodiment of vmy in.- vention herein illustrated, the housing Vor Ais so connected to the casi 'tool may be increased oi' diminished by vary.

s y end of the luf Fig. l is a detail side elevational view ofY casi (l which incloses the opei ating parts of the reciprocating tool is preferably made in two sections 11 and 12 secured bolts 18 extending through ears tegrally with adjacent contacting` together by formed inportions of ly projecting` lugs 18.

One oi the imporaaiit features of my novel if'ibratory tool construction comprises the em-V ployment ot means whereby the vibratory .or

striking action of ,the movable p arts within the casing are Ydirectly transmitted to the reciprocating tool and the reciprocating tool that the vibra-g tory or reciprocating` movement transmitted to the tool is prevented to a considerable extent 'from being tran red to the casing.

Thisiiiechanisni comprises a reciprocating anvil 19 which i,` oc

allym ounted within the bore ci i?. f e anvil 19 is prow dedv with a socl t 2O lich is adapted to receive therein a tool 21, ysuon as or tainping tool. vil 'Slis provided w. and immediately above the flange vil plate 23 secured 'he anvil by being welded ingiy its reciprocatory movement r drill e lower end oiiilieV anannular flange 22 with an aiipreferably thereto. rllie anvil is yieldo1 resiliently suiciported and limited in within the bore of thesleeve 17 by two pairsv of compression springs Q4 and respectively mounted on suitable studs thro ed into t lower e-.i

are cc noressed l and the upper the lugs d of the sleeve 17. Jetween the 2'? termed in the lower side ot the anvil plate 23 tlieugh apertures in which L. i the Studs 26 extend, as clearly shown in Fig. y

1. The springs are disposed between 'the lower sine ot the plateV 2S and the A.uts Q8 which in turn are secured ment by locl nuts 29.

displace As the result et the described construction the springs and 2li are readily accessible ier inspection, removal or replacement, with out opening the casing, and, similarly, the degree ol compression of said s )rings can be readily modified to suit varying V,onditions by merely adjusting the nuts 28 and 29.

TErom the above desc iption it `fwill be seen that the anvil, together with the tool, is yielding-ly or r alliently connected to the casing so that the vibration transmitted to the ca.YA ing as the result olf the impacts the hamagainst the anvil vill be reduced to a in in imum.

Formed integrally with and extending across the interior et the housing member 12 is a pedestal vfeb supportingI portion 30 Which is reinforced by Webs 31 which are arranged at right angle-s with respect to the portion Si Secured vto 'the pedos 'al supporting portion 8O by means et bolts 32 t is a pedestal, or

lniaring b acket 3?. The pedestal 33 is pro vided with a` main bein-ing portion 811 in which is mounted i otary shaft 35 provided ni' gr one end with a (fr .nlr 3G. A ila ae 37 on the shaft engaging on xnd ot a be, ng bushing 88 mounted within the bearimY portion 34: ot the bracket absorbs e nd tl i t. Secured to the other end oi' vthe shait is a sprocket -heel driven by a chain Ll() trom a sprocket Al1 secured to the shaft 42 of an electric niotor L13. The electric motor Il?, is secured to one side o? the housing member 12 by means et bolts The chain L10, and the sprocket Ll1 mounted on the shaft ot the motor are con'lpletely encased in a dust proofcasing formed as an ente ision f6 of' the casing member 12. the bearing hrenn i ret l in which is mounted a shoulder stur lockerL `lnfein by nut fir' 50 threaded on ir'ivotabv n1 ot the sbo nier 51.

n enlere'e 9 is 'oscillating han;- ainnier provided. with i fino head or Weight which l, 1upper end ot the both sides oit tlf-.e

1 0 ed apertures there f, i with the enlarged bearing portion oVA i ouldered cleail;v sho ber has tangular chier i tie adjustable bo 57. threaded bolts 57 :lave

short `pin extensions as shown at 58, on 'which are nieunted two eppositely disposed comtion (31 of which is journalled on tno crank "n it? of shaft The connecting rod i j rovide at its other end bifurcated portions 52 provided with trrnsversc ali d through which a pin extend pi .f'otaily connecting the rod to a bearing portion (i to.' ned on the lower side oi the rorltingr member 53.

From the above description it will be seen that a c ank shalt 35 is operatively driven by the motor through the chain l() and sprockets 39 and 11, the rocking mem 23 will be oscillated by the connecting rod (3o, thereby causing the hammer to intermittent ly impact the anvil 19 when by pressure of the tool against the Work the anvil is caused to move into the path oit oscillation of the hammer head. 1n order to retard the up Ward movement of the hammer at the top oi' its stroke, l have provided a butler spring (36 which is positioned at such an angle that its lower end will bc in a position to be struckV by the upper side of the hannmer shank near the extremity of its up-strolre. The buter springl is held in posit-ion by a stud 6T which is secured to an apertured bof-as (35i formed integrally with the bearing bracket 33. The stud is provided with a periplu'aal flange 69. Secured between the 'flange (i9 and the boss G8 a clamp T() which is adapt ed to engage the coils ot the spring and sul' port the spring in the position shown in Fig. l. rlChe lower end of the stud il? is provided With an extension T1 Which diende 'nto the butler spring 5G and forms a guide for the same.

The operation oit the c vice is as follows: Let us assume that the electric motor is thrown into operation can ing the chain LO to operatively drive the shaiit 35, which in turn, by reason of the rocking member 53 and connecting link (30, oscillates the hammer 51 about its pivot on the shoulder stud 19. It will be noted that by reason of the springs 59 engaging the opposite sides of the hammer, the hammer will be oscillated under the yielding pressure o'l2 these springs and when the anvil 19 and the tool `21 are in the position shown in l41 l. the hammer will oscillate Without striking the anvil, but when the tool 21 is positioned against the Work and the casing depressed With respect to the tool and anvil, thereby compressing the springs 24, the anvil will abrrfe described 1..-

be brought within the path of the reciprocating head 52 of the hammer so that the vibratory movement of the'haminer will be transmitted to the tool. It will also be noted 2 that by my improved construction the intensity of the vibratory action may be increased in direct proportion to the pressure placed upon the tool against the work.

While I have described one embodiment which my invention may 'assume in practice, it will, of course, be understood that the same is capable of modification and that modification may be made without departing from the spirit and' scope of my invention as eX- t, pressed'in the following claims.

Vhat l claim as myinvention and desire to secure by Letters Patent is: v

l. In a vibratory tool, the combination with a casing, a helve pivotally mounted for swinging movement in said casing,1a motor secured to said casing7 a movable tool, means for reciprocating said helve to operate' said tool including a crank shaftV mounted in said casing, a. rocking member pivoted for 'rocking movement concentrically with the Ypivot of said helve and a connecting link connecting saidcrank shaft with said rock- .f Y and to said rocking member.

In a vibratory tool, the combination with a casing, a helve pivotally mounted in said casing, motor secured tosaid casing, a movable tool connected with said "y: casing, means for reciprocating said helve to operate said tool including a. crank shaft operatively driven by said motor, a rocking member pivotally mounted-in said casing and having the free end thereof resiliently 1 connected to said'helve and a connecting link connecting said rocking member and said crank shaft.

4. In a vibratory tool, the combination with a casing, a helve Vpivotally mounted forswinging' movement insaid casing, a.

motor securedto said casing, a movable tool connected with said casing, means including a crank shaft vjournalled vin said casingand operatively driven by saidmotor, a rocking member ournalled in said casing having its free end yieldingly connected to said helve Vand a connecting link connecting said crank shaft with the free end of said'rocking member for operatively driving said" helve.

5. In a vibratory tool, the .combination with a casing, a helve pivotally mounted for swinging movement in said casing, a motor secured to said casing, a movable tool connected with said casing, means for reciprocating said helve to operate said tool including a crank shaft journalled in said casing and operatively connected to said motor, a rocking member pivoted so as to rock concentrically with the swinging movement of said helve and having the free end thereof disposed on the opposite sides of said helve and yieldingly connected thereto and a connecting link operatively connecting said crank with the free end of said rocking member.

(i, in a vibratory tool, the combination with a casing, a helve pivota-lly mounted for swinging movement in said casing, a motor secured to said casing, a movable tool connected with said casing, means for reciprocating the helve to operatesaid tool including a crank shaft ournalled to said casing and operatively driven by said motor, a rocking member pivoted to rock concentrically with the swinging movement of saidV helve and having the free end thereof provided with oppositely disposed springs for yieldingly connecting said rocking member to said helve7 and a connecting link operatively connecting said rank shaft wit-h the free end of said rocking member. i I

7. In a vibratory tool, the combination with a casing, a helve pivotally mounted for swing- .ing movement in said casing, a motori secured to said casing, a movable tool connected with said casing7 means for reciprocating the helve to operate said tool including a crank shaft journalled in said casing and operatively connected with said motor, a rocking member pivoted within said casing and having the free end embracing a portion of said-helve, two oppositely disposed compression springs adjustably mounted in the free end of said rocking;` member and engaging the opposite sides of said helve and a connecting link journalled on said crank shaft and pivotally connected to the free end of said rocking member for operatively driving said helve. S, ln a vibratory tool, the combination with a casing, a helve pivotally mounted for swinging movement in said casing, a motor secured to said casing, a movable tool operativelyconnecte'd with said casing, means for reciprocating'the helve to operate said tool including aA bearing bracket secured within said casing, a crank shaft journalled in said bearing bracket and operatively driven by saitL mctor, arocking member pivoted te said bracket having the free end thereof embraccoiinecting said crank shaft with tbe tree end of said rocking member.

9. In a vibratory tool, the combination with a c' sing, a belvevpivotally mounted in said casi jeurnalled in said bearine` bracket and operatively driven by said motor, a rocking member pivoted to said bracket having tbe tree end thereof embracing a portion of said belve, means 'tor yieldingly connecting` the tree end of said rocking member to said belve, means tor adjustingy the free end of said rocking' member with respect to said belve, and means mounted ivitbin said casing and in the path oit movement ot' said belve for bniiing tbe upper movement or said belve.

10. In a vibratory tool, the combination With a. easing, a belve pivotally mounted in said casing, a motor secured to said casing, a movable tool operatively connected with said casing, means for reciprocating the belve to operate said tool includiiig` a bearing bracket secured within said casing, a crank shaft join-nailed in said beariiigll` bracket and operatively driven by said motor, a rocking ineinber pivoted to said bracket having,` the free end thereof embracing a portion of said belve, means for yieldingly connecting the free end of said rocking member to said belve, means for adjustingl the free end of said rockint' member with respect to said belve, and resilient means secured Within said casing and in the path of movement of said belve for bufiing` the upper movement of said belve.

11. In a vibratory tool, tbe combination vvitb a casing, a belve pivotally mounted in said casing, a motor secured to said casing, a movable tool operatively connected with said casing', means for reeiprocating,` the belve to operate said toolV including' a bearing` bracket secured within said lrising, a crank sba'tt journalled in said bearing` bracket and operatively driven by said motor, a rocking meniber pivoted to said bracket having the tree end thereof embracing a portion of said belve, means for yieldingly connecting the free end of said rocking member to said belve, means ior adjusting` the tree end of said rocking member n tb respect to said belve, and a buffer spring positioned at an angle vvitb respect to said belve and secured to said bearing; bracket for bui'lingv the upper movement ot said belve.

19.. In a vibratory tool, tbe combination ot a portable casing, a belve pivotally mounted therein, and means for reciprocating said belve including` a rocking member pivoted concentrically vvitb tbe pivot of said belve, a resilient connection between said member and belve spaced from their common pivot,

and means `for rocking,` said member.

13. In a vibratory tool, tbe combination of' a casing, a belve pivotally mounted therein, and means for reciprocating said vbelve including a crank shaft mounted in said casing, means for driving said shaft, a rocking niember pivoted concentrically with tbe pivot of said belve, a resilient connection between said member and belve spaced from their' common pivot, and a connecting` link between said shaft and member.

14. In a vibratory tool, the combination with a portable casing, av belve pivotally mounted in said casing, a motor secured to said casing, and means 'for reciprocating said belve including a crank shaft mounted in said casing, a rocking member pivoted concentrically with the pivot ot said belve and a connecting link connecting` said shaft and member.

15. In a vibratory tool, the con'ibination of a supporting structure, a belve pivotally mounted thereon, and means for reciprocating said belve, including a rocking; member Vpivoted concentrically with the pivot of said heive, a resilient connection between said member and belve spaced from their-common pivot, and means for rockin g said member.

16. In a vibratory tool, tbe coinbinatimi ot a supporting structure, a belve pivotallj.7 mounted thereon, and means for recil-nocating said belve, including a rocking;- member pivoted concentrically with the pivot ot said belve, an Aadjustable resilient connection `between said memberand belve spaced from their mutual pivot, and means for rocking said member.

1T. A combination sucb as defined in claim 15 in which an element of said resilient connection is adjustable toward and from said belve.

18. A portable power operated tool comprising, a easing adapted to receive a reciprocating` tool and equipped with a` manipula* ing handle, a motor attached to said casing, and means enclosed Within said casino,` and driven by said motor tor actuating` said tool, said means including a pivoted oscillatingl member provided with a Weighted head, an oscillatingl actuator yieldably associated vvitb said member to actuate the same, a shaft operatively connected with said motor and provided with a crank, and a connecting` rod between said crank and said actuator.

19. A portable power operated tool comprising, a casing adapted to receive a reciiV rocating tool and equipped with a manipulating handle, a motor attached to .said casina, and means enclosed Within said casing` and driven by said motor Yfor actuating said tool, said means includinga pivot-ed oscillating member provided with a Weighted bead, and an oscillatory actuator connected with said motor and yieldably associated With said member to actuate the same.

20. A portable power operated tool comprising, a casing adapted to receive a reciproeating tool and equipped with a manipulating handle, a motor attached to said casing, an oscillating member pivoted in said casing and provided with a weighted head disposed in operative relation to said tool, an actuator pivotally mounted to oscillate in said casing and yieldably connected to said member, means driven by said motor for positively operating said actuator, and means whereby the inoperative stroke of said weighted head is cushioned.

21. A portable power operated tool coinprising, a casing adapted to receive a reciprocating tool and equipped with a manipulating handle, amotor attached to said casing, a weighted head for actuating said tool by impact, an oscillatory member pivoted in said casing for moving said head back and forth in a predetermined path, means for producing a cushioning eiect upon the inoperative stroke of said head and an actuator positively driven from said motor for yieldably actuating said oscillatory member during the operative stroke of said head.

22. A portable power operated tool comprising, a casing adapted to receive a recipe rocating tool and equipped with a manipulating handle, a vibrating weighted head adapted to actuate said tool by impact, means for cushioning the movement of said head away from said tool and positively driven power operated means for yieldably urging said head toward said tool.

In witness of the foregoing I affix my signature.

HUGH STEWART BROWN. 

